installer running on FC4 not making /usr/bin symlinks

Hi.  I'm remotely installing BK a box.
The installer is saying that /usr/bin is not writable, although it
appears to be.

[root@linux ~]# ./bk-3.2.5-x86-glibc23-linux.bin 
Please wait while we unpack in /tmp/bksetup3564 ...
Cleaning up temp files in bksetup3564 ...
[root@linux ~]# ls -ld /usr
drwxr-xr-x  14 root root 4096 Sep 20 17:06 /usr
[root@linux ~]# ls -ld /usr/bin
drwxr-xr-x  2 root root 61440 Sep 21 11:08 /usr/bin
[root@linux ~]# id
uid=0(root) gid=0(root)
groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
context=root:system_r:unconfined_t
[root@linux ~]# ls -l /usr/bin/foo
ls: /usr/bin/foo: No such file or directory
[root@linux ~]# touch /usr/bin/foo
[root@linux ~]# ls -l /usr/bin/foo
-rw-r--r--  1 root root 0 Sep 21 11:26 /usr/bin/foo
[root@linux ~]# 

The first command is the run of the installer that refused to set up the
symlinks.

Is this some sort of selinux hangup, or is the installer just pooched?

cheers
-mark
-- 
I'm going to continue never washing this cheek again. - Fry